单项选择题

Technology has indeed had a direct______on our life today.

A．change
B．effort
C．effect
D．role
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单项选择题
Words can have different meanings depending on the______in which they are used.
A．context
B．contact
C．content
D．contrast
单项选择题
Her remarks left me wondering______she could have changed so suddenly.
A．when
B．how
C．whether
D．that
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